Tentering machine



March 4, 1930. A. o. HURXTHAL 1,749,584

TENTERING MACHINE Filed June 18. 1928 3 Sheets-Sheet l 5 Smeets-Sheen` TENTERING MACHINE March 4, 1 930.

March 4, 1930. A. o. HURXTHAL TENTERING MACHINE Filed June 18. 1928 3 Sheets-Sheet 40 nozzle, by means of whlch an increase 1n the Patented Mar. 4, 1930 PATENT, oF

FICE

lAIIIEHIEJJ'S V0. 'HURXTHAL OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO PROC- TOR & SCHWARTZ, INCORPORATED, F PHILADELPHIA, PENNSYLVANIA, ACOR PORATION 0F PENNSYLVANIA TENTERING MACHINE Application led .Tune 18,

This invention. relates to tentering machines', and particularly to means for controlling therein. v

In machines of this character the goodsy to be dried is usually stretched taut in a horithe circulation of the drying air zontal plane between transversely spaced supports, which extend longitudinally of the machine, and the drying air forced through the goods in a vertical direction, the goods at the same time passing through the machine in a longitudinal direction. .l There are times when this method of drying can not be employed, for example, in the drying of line goods, such as silks, in which bowing of the goods between the supports,

by the air being forced through the goods, will cause the fabric to split or tear, and also in the drying of materials which are so made that the air can not be properly forced through the goods, as for example,.wherein the material is covered by another sheet.

The principal object of this invention is to provide a machine which will be capable .of efiiciently drying any and all classes of fabrios, by constructing the machine in such a manner that the air currents will be passed across the goods in a substantially horizontal direction and in contact with both faces of .the goods simultaneously. By this method the-pressure of the air against the opposite faces of the goods is substantially e ualized, which prevents bowing of the fabric etween the supports.

Another object of the invention is to construct the machine in such a manner that the -portion of the air passage therein,through of the said goodswhich the goods travels, will be contracted or restricted'in a mannertto form, in effect, a

velocity of the air will be obtained adjacent the goods, thereby effecting a rapid drying The construction of a machine made in, a'ccordance with the principles of the invention will be fully disclosed hereinafter, reference being hadto the accompanying drawings, of

which Fig. 1 is av diagrammatic longitudinal sec- 192s. serial No. 286,320.

showing still other modified forms of the invntion.

Referring to Figs. 1 to 4 inclusive, the machine comprises a suitable casing 1 composed of side walls 2, 2, end walls 3, 3 and a roof 4, the casing 1 being mounted on a ioor or similar support 5. A transverse partition is located intermediate the end walls 3, 3, which divides the interior of the casing 1 into two separate compartments 6 and 7 respectively.

At spaced intervals throughout the length of the casing 1 are located supports 8, 8 each of which comprises a pair of vertical pedestals 9, 9 connected at their upper ends by a bridge element 10.

Extending longitudinally of the casing 1 and carried by the supports 8 is a pair of rails 11, 11, in the upper face of each of which is formed a pair of parallel longitudinally eX- tending grooves 12. In the grooves 12, 12

of each rail 11 is suitably mounted a cable or chain 13 which passes around suitable wheels 14, 14 which are 'rotatably mounted at the opposite ends of each of the rails 11. The chains or cables 13 are provided with vertically extending pins 15 which are adapted to pass through the opposite longitudinal edges of a strip of material m which is to be dried. The rails 11, 11 with the conveyers 13 respectively carried thereby maintain a strip of material in a t-aut condition in a horizontal plane, as illustrated in Figs. 3 and 4. Any suitable means, vnot shown, may be provided for driving the conveyers 13,13 in unison in order that the stripof material will be car- .ried through the machine.

Extending in a vertical plane and longitudinally ofthe casing 1 is a partition 16, whichl is provided with a series of circular openings 17 in each 'of which is rotatably mounted a fan 18. Each fan is secured to one end of a shaft 19, 'the opposite end of which projects through one or' the sidewalls 2 and is provided at its outer end with a pulley 19a by means of which the tan is adapted to be rotated. The partition 11 extends' from the floor 5 to a point below the under side of the adjacent supporting rail 11.

Intermediate the supporting rails 11, 11 is a i l suitable framework 20 on which is mounted a series of heating coils 21,21.

Extending between the top edge of the partition 16 and the adjacent sidel of the framework 20 is a horizontally disposed partition 22,`which divides the interior of the casing 1, at one side of the'vertical partition 16, into a heating chamber 23 and avdrying chamber 24. A circulating chamber 25- is formed between the i-'ertical partition 16 and the adjacent side wall 2 of the casing 1.

The fans 18 located inthe compartment 6 of the casing 1 are adapted to be rotated in one direction and thereby circulate the air in the said compartment in the direction inf dicated by arrows in Fig. 3, while the fans in the'compartment 7 are adapted to be rotated in an opposite direction to circulate the air in the compartment 7 as indicated by the arrows in Fig. "4, whereby the goods a?, in passing longitudinally through the/casing l, is subjected to air currents, lirst from one edge then from the opposite edge.

Rotation ofthe fans 18 in the compartment' 6 will cause a circulation of air, as indicated by the arrows in Fig. 3, as above noted, the air being drawn from the 'circulatingl chamber 25 through the openings 17 in the partition 16 into the heating chamber 23, around the heating coil 21, thence upwardly into the drying chamber 24, returning to the circulating chamber 25 a passage formed between the top of the partition 16 and the roof 4.

' Mounted on top of the framework 20 intermediate the rails 11, 11 is a horizontally extending ,baiiie plate 126 which lies in a plane substantially parallel to and below the plane.

assumed-by the material as it passes through I preferably below the. strip of material lothe machine. Parallel to the baH'le plate 26 and located above the material 'is a second baiiie plate 27.

V:sus

The air in circulation in the compartment 6 is directed between the balile' plates 26 and 4 v27 by means of angularly disposed baillev plates 28 and 29. The angularly 'disposed baille plate 28 is secured along oneot its longitudinaledges to the roof 4 and along its opposite edge to a corresponding edge of the horizontal baflie plate'27. The angularly disposed baiie plate 29 is secured along`one of "an upper horizontal baHe plate 261 its 'longitudinal edges tothe correspondingD edge of-the horizontal baille plate 26, and

,along its opposite edge to a bar 30 carried by arms 31 extending laterally from the frame 20.

This' construction produces an air nozzle 32 which contracts or restricts the air passage. The material to be dried is suspended substantially equidistant between the horizontal baliie plates 26 and 27 `.which form the upper and lower walls of the air nozzle. The pressure of air banked in the side of the drying` chamber adjacent the angular baliies 28 and 29 is built up by the fan 18 andin seeking egresspasses through the nozzle 32 at an 'increased velocity which eiects a rapid drying ot the goods In the compartment 7 the air is circulated in an opposite direction across the goods w, as indicated in Fig. 4.' In this compartment 7 the angularly disposed baiiie plates 28" and 29a are at the opposite sideot the horizontal battles 26 and 27. The bal'lle 28a extends from the edge of the horizontal baille 27 to the" roof 4 while the baille 29a extends from the corresponding edge of the horizontal battle 26 to a point on the upper side'of the horizontal partition 22 intermediate the `vertical partition 16 and the frame 20. vOnthe opposite side of the frame 20 is located a short vertical partition 33 which directs the air into the heating chamber 23 around the heating coils 21.

In the compartment 6 the air from the fans 18 is directed against the heating coils 21 by means of angularly disposed baille plates 34 and 35 as indicated in Fig. 3.

From the above description, it willbe notedl that the air circulated by the fans 18 passes first through the heating'coils 2l, whereby As shown lin Figs. 3l and 4, the temperature ofthe air as it passes-through the restricted passageway 32 is raised or-boosted by heating or booster coils 45 located in the passageway between the plates 26 and 27 and cated in the passageway. r Obviously the fans may be located at any desired point in the'air passage without departing from the essential features of the `1n vention, for example in Figs. 5 and 6 the fans are shown as being located on one end of the drying chamber and in Figs. 7 and 8 the fans are shown as being located at the center of the casing under the lower wall of the air` nozzle. i

In Figs. 5 and 6 the air an angularly disposed baile plate 28h, at each of its opposite edges, and a lower baille plate l' nozzle 32a comprises having 275 composedo'f a pair of angularly disposed sections 29h, 29h. Y f f The horizontal partition 22b in this instance extends substantially across the entirek area of the casing joiningwith the lower edge of the vertical partition 16b at one side and stopping short of the ,side wall 2 at the opposite side to provide a passageway 40 for vthe air between the heating chamber 23b and the mitted in ,any suitable and common manner,

such vas screened openings in the side walls of the -casing at the air-receiving side of the q heating chamber.

In each of Figs. 'Zand Sthe roof 4 of the caslng forms the upper wall of the air nozzle while the lower wall of the saidnoz- 'zle is formed by a horizontal baiie plate located under the goods-m, `the circulating fans being locatedy directly below the baffle plate, andthe heating coilsbeing located immediately adjacent the fans.

the heating coils 21c between the under side of the fabric and the upper -side of the baffle 27c by a depending baffle 36 on one edge of the horizontal baiile 27, and a 'depending ba fle 37 secured to one of the rails llc, the air for the upper side of the fabric passing around the outer edge of the rail 11c and thence between the said upper side ofthe fabric and the roof 4. A baiiie 38uis located within the heating coil 21c and directs a portion of they air flow upwardly between the baffles 36 and 37.

In Fig. 8, the air is circulated in an oppo-v site direction from that shown in Fig. 7 and the rail 11dl is provided with a depending curved baffle .3Q/between which and a short depending-#flan/ge 36d on the horizontal baffle f vformed by a pair of walls disposed relatively 27d lthevair passes, the depending flange 36c on the opposite edge of the' horizontal balile p 27d directing the air downwardly onto the heating-coils 21d.' y

In each instance the portion of the air passage, through which the material to be dried is passing, is restricted or 'contracted with respect to the remainder of the air passage, thus a high velocity. of the air is obtained in the restricted portion of the air passage and- 4immediately adjacent both the opposite faces tion-of the air passage.'

I claini: y v 1 In a tentering machine, the combination fof 'a casing, having arestricted ,passageway formed by alpairof walls disposed relatively of the fabric located in said restricted porv close vtogether v and extending longitudinally of said casing, meansfor supportinga strip of material in saidA passageway, 4and means for forcingair through-'said passageway in a direction transversely of the strip of material.

2. In a tentering machine, the combination of a casing, having a restricted passageway formed by a pair of walls disposed relatively close together and extending longitudinally and continuously from endto end of said casing, means for supporting a stripof material in and advancing said strip longitudinally throu h said restricted passageway, and means or forcing air through said restricted passageway in a direction transversely of the strip of material.

3. In a tentering machine, the combination of a casing, having a restricted passageway formed by a pair of walls disposed relatively close together' and extending longitudinally A21nd continuously from end4 to end of saidl casing, means for supporting a strip of ma terial in and advancing said strip longitudi-y nally through said restricted passageway, means for forcing air through said restricted passageway in a direction transversely of the strip of material, and means for heating y Y the air. .InvFig 7 the heated air isv directed from 4. In a tentering machine, the combination of 'a casing, having a restricted passageway formed by a pair of walls disposed relatively close together and extending longitudinally and continuously from end to end of said casing, means for supporting a strip of material in and advancing said strip longitudinally through said restricted passageway, means for circulatingair in said casing in a direction transversely of the casing, and means for directing the circulating air into said restricted passageway at one open longitudinally extending side thereof, whereby said air is caused to pass through said passageway in a direction extending transversely of the strip of material therein.

`5. In a tentering machine, the combination of a casing, having a restricted passageway close together and extending longitudinally and continuously from end to end of said casing, means for supporting a strip of material in and advancing said strip longitudinally through said restrictedpassageway, means for circulating air in said casing in a direction transversely of the casing, means for directing the circulating air into said restricted passageway at one Qpenlongitudinally extending side thereof, whereby -said air is caused to pass'through said passageway in a direction extending transversely of `the strip of material therein, and means for heating the l.air 1n circulation.v

6. In 'a tentering machine, the combination of an elongated casing, having a restricted A,

passageway ,formed by apair of walls disposed relatively close together and extending longitudinally and continuously from end to end of said casing, means for supporting a strip of material in and advancing said i strip longitudinally .through said passagelWay, means at spaced intervals along said casing for circulating air in direction transversely of said casing, and means for directstrip of material in and advancing said strip longitudinally through said passageway, means at spaced intervals along said casing for circulating air in a direction transversely of said casing, means for directing the circulating air into said passageway at a longitudinally extending open side thereof, whereby the air is caused to pass through said passageway in a direction extending transversely of the stript of material, and means for heating the air in circulation.

8. In a tentering machine, the combination of an elongated casing, a transversely ex-l tending partition in said casing whereby said casing is divided into separate compartments, a restricted passageway extending longitudinally ofsaid casing and throughy said transverse partition, means in each compartment for circulating air therein in a direction transversely of said casing and transversely through the portion yolf-said restricted pas-v sageway lying in each of the respective compartments, the air currents passing in opposite transverse directions in the portions ofthe passageway lying within compartments.

9. In a tentering machine, the combinathe respective ltion of an elongated casing, a transversely extending partition in said casing whereby 7 said casing is divided into separate compartments, a restricted passageway extending 1on-` gitudmally of said casing and through sald ,transverse partltion, means meach compartment for circulating air therein in a direction transversely of sald casing and `transversely through'the portion of saidrestricted passageway lying in each ofthe respective compartments, the air currents passing in opposite transverse directions in the portions of the passageway lying within the respective' compartments, and means-ineach compartment for heating the air in circulation.

10. In a tentering machine, the/'combina-Y tion of a casing, a transversely extending partition in said casing dividing said casing into separate compartments, a restricted passageway extending longitudinally of said casing and through said partition, the opposite longitudinally extending sides or said passageof material in and advancing said longitudinal strip through said passageway, means in the respective compartments for circulating air in 'opposite transverse directions in the respective compartments, and means at opposite open sides of the portions of the passageway lying within the respective compartments, for directing the oppositely moving currents of air into the respective portions oi" the restricted passageway.

11. Ina tentering machine, the combination of a casing having an air passage formed therein and a restricted passageway formed in said air passage and extending longitudinally and continuously from end to end of the casing, means for circulating air through the airy' passage and the restricted passageway vincluded therein in a direction transversely of the casing, means for supporting a strip of material within'the restricted passageway, and means within the said restricted passageway for heating the air passing therethrough.

12. In a tentering machine, the combina.- tion or a casing having an air passage formed therein and a restricted passageway :formed in said air passage and extending longitudinally and continuously from end to end ol" `the casing, means for circulating air through the aigr passage and the restricted' passa-geway included therein in a `direction transversely of the casing, means for supportmg a strip of material within said restricted passageway, means in the air passage for heating the air in circulation, andmeans within the said restricted passageway for boosting the temperature of the air as it passes therethrough.

ALPI-IEUS O. HURXTI-IAL.

,way being open, means for supporting a strip p 

